Every year, 20 to 30 Alaska Airlines employees volunteer to help Mt. Edgecumbe High School students get glammed up for prom.(KCAW/McKenney) Listen to the full sound-rich feature here. Five hours before prom starts, the common room of the Mt. Edgecumbe High School girl’s dorm is filled with the smell of hairspray and roses, and sounds of girls chatting, hairdryers buzzing, and music playing from a speaker in the center of the room. Like many high…